| 摘要 |
<p>PURPOSE: To inform a golfer of an appropriate direction of an impact on a golf ball. CONSTITUTION: A luminescent apparatus capable of emitting a light beams 14, preferably a lazer oscillator 4 is built in a club. The luminescent apparatus 4 is actuated by a push button disposed in a grip part 3 of the club. The light beams moves downward in an axial direction inside the club, reaches a reflection mirror 11, turns thereat and is irradiated outside from a window 10 in a beam parallel with a theoretical locus of a ball which is hit by the club.</p> |
